TransitionDrawable不考虑填充？

Question

我试着接受的解决方案发布here，但它似乎忽略填充。当第二个视图（在这种情况下是一个按钮）显示时，它比具有填充的原始视图小得多。有没有解决方法？谢谢

Answer 1

是的，TransitionDrawable从LayerDrawable延伸忽略填充。这是在基本的Android代码，它摆脱任何事物的getPadding()方法指定：

@Override 
    public boolean getPadding(Rect padding) { 
     // Arbitrarily get the padding from the first image. 
     // Technically we should maybe do something more intelligent, 
     // like take the max padding of all the images. 
     padding.left = 0; 
     padding.top = 0; 
     padding.right = 0; 
     padding.bottom = 0; 
     final ChildDrawable[] array = mLayerState.mChildren; 
     final int N = mLayerState.mNum; 
     for (int i=0; i<N; i++) { 
      reapplyPadding(i, array[i]); 
      padding.left += mPaddingL[i]; 
      padding.top += mPaddingT[i]; 
      padding.right += mPaddingR[i]; 
      padding.bottom += mPaddingB[i]; 
     } 
     return true; 
    } 

见base Android code here。

来对付它，我必须设置我的看法故障绘制背景前先保存填充值：

int bottom = theView.getPaddingBottom(); 
    int top = theView.getPaddingTop(); 
    int right = theView.getPaddingRight(); 
    int left = theView.getPaddingLeft(); 
    theView.setBackgroundResource(R.drawable.faulty_drawable); 
    theView.setPadding(left, top, right, bottom);